论文标题
Beta Cephei Star beta beta crucis中非放射振荡模式的极化检测
Polarimetric detection of nonradial oscillation modes in the beta Cephei star beta Crucis
论文作者
论文摘要
在这里，我们报告了由于Beta Cephei Star beta beta beta beta beta beta beta beta beta beta beta crucis中极化变化的检测。在这样做时，我们确认了40年历史的脉动诱导的极化变异性及其在Mode识别中的二极异性及其在企图识别中的效用。在适合其他Beta CEP恒星的方法中，我们将极化法与空间光度法和档案光谱相结合，以确定极化仪F2中的主要非放射模式，为L = 3，M = -3（在DZIEMBOWSKI的M量度中），并确定恒星Axis的位置角度为25（或205 deg）。旋转轴倾斜到视线的倾斜度为大约。 46度从偏振和光谱的组合来看，促进了其他模式的识别并允许进行呼吸震动建模。这揭示了14.5 +/- 0.5太阳能的恒星和大约包含的对流芯。其质量的28％ - 使得十字念珠菌成为具有英言震年的最庞大的恒星。
Here we report the detection of polarization variations due to nonradial modes in the beta Cephei star beta Crucis. In so doing we confirm 40-year-old predictions of pulsation-induced polarization variability and its utility in asteroseismology for mode identification. In an approach suited to other beta Cep stars, we combine polarimetry with space-based photometry and archival spectroscopy to identify the dominant nonradial mode in polarimetry, f2, as l = 3, m = -3 (in the m-convention of Dziembowski) and determine the stellar axis position angle as 25 (or 205) +/- 8 deg. The rotation axis inclination to the line of sight was derived as approx. 46 deg. from combined polarimetry and spectroscopy, facilitating identification of additional modes and allowing for asteroseismic modelling. This reveals a star of 14.5 +/- 0.5 Solar masses and a convective core containing approx. 28% of its mass -- making beta Crucis the most massive star with an asteroseismic age.
